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Finding the Fourth Proportional to 72,549.29, 100,127.79 and 40,719.93

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Solution

The fourth proportional to 72,549.29, 100,127.79 and 40,719.93 is: 56,198.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,549.29 : 100,127.79 = 40,719.93 : x
  2. Step 2: Convert to fraction form
    72,549.29/100,127.79 = 40,719.93/x
  3. Step 3: Cross multiply
    72,549.29x = 100,127.79 × 40,719.93
  4. Step 4: Simplify right side
    72,549.29x = 4,077,196,599.85
  5. Step 5: Solve for x
    x = 4,077,196,599.85/72,549.29
  6. Step 6: Final answer
    x = 56,198.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.